EP0103262B1 - Lathe spindle with a chuck compensated for centrifugal forces - Google Patents
Lathe spindle with a chuck compensated for centrifugal forces Download PDFInfo
- Publication number
- EP0103262B1 EP0103262B1 EP83108787A EP83108787A EP0103262B1 EP 0103262 B1 EP0103262 B1 EP 0103262B1 EP 83108787 A EP83108787 A EP 83108787A EP 83108787 A EP83108787 A EP 83108787A EP 0103262 B1 EP0103262 B1 EP 0103262B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chuck
- spindle
- flange
- lathe spindle
- chuck body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/14—Chucks with simultaneously-acting jaws, whether or not also individually adjustable involving the use of centrifugal force
- B23B31/141—To counterbalance the jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2250/00—Compensating adverse effects during turning, boring or drilling
- B23B2250/08—Compensation of centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/122—Safety devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/24—Chucks or sockets by centrifugal force
- Y10T279/243—Chucks or sockets by centrifugal force to counterbalance jaws
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T82/00—Turning
- Y10T82/25—Lathe
- Y10T82/2552—Headstock
- Y10T82/2562—Spindle and bearings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T82/00—Turning
- Y10T82/26—Work driver
Definitions
- the invention relates to a lathe spindle according to the preamble of claim 1.
- the invention has for its object to design the lathe spindle of the type mentioned in such a way that the overhang of the chuck is as small as possible.
- the chuck or at least part of the chuck is integrated into the lathe spindle, so that the overhang of the chuck can be reduced by the axial length of the chuck base.
- the chuck body can be fastened to the chuck base integrated into the spindle flange by connecting elements such as bolts, forms a compact unit so that there is no joint between the spindle flange and the chuck base and there is high rigidity in this area.
- Another advantage of the shorter length is that it is now possible to completely cover the joint between the spindle flange and the chuck body, including the radial grooves for the centrifugal weights, by means of a ring that is attached to the machine housing and thus protect it against coolants and chips. Since the outside diameters of lathe chucks are standardized, a single, universal cover ring is sufficient, which does not have to be removed when changing the chuck due to the easy-to-use O-ring seal to the chuck body.
- the rotating spindle 11 of a lathe is supported by bearings 12 in the machine housing 20 and has a flange 13 for the releasable fastening of a chuck with centrifugal force compensation.
- the bottom of the chuck is formed in one piece together with the spindle flange 13.
- radial grooves 14 (FIG. 2) are formed on the side facing the chuck body 15, in which the sliders 22 are slidably guided, which act on the clamping jaws 16 via deflection levers and base jaws, not shown, in the chuck body 15.
- a ring 17 is fastened, which extends over the flange 13 to the chuck body 15, on the circumference of which the ring 17 abuts by means of an O-ring.
- the chuck body 15 there are those parts which are required for the adjustment of the clamping jaws 16 by means of a draw tube inserted into the spindle bore.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Turning (AREA)
Description
Die Erfindung betrifft eine Drehmaschinenspindel entsprechend dem Oberbegriff des Anspruchs 1.The invention relates to a lathe spindle according to the preamble of claim 1.
Es ist bekannt, dass es der Übergang zu höheren Drehzahlen bei Drehmaschinen erforderlich machte, einen Fliehkraftausgleich zu schaffen, um eine radiale Auswärtsbewegung der Spannbakken und damit ein Lösen eines Werkstückes zu verhindern. Hierzu sind, wie etwa im DE-GM 76 13 635.1 beschrieben, am Flansch der Drehspindel einer Drehmaschine lösbar befestigbare Spannfutter bekannt, die in ihrem Futterboden radiale Nuten aufweisen, in denen Gleitstücke verschiebbar gelagert sind. Diese wirken über Umlenkhebel auf die Grundbacken der Spannbacken als Fliehkraftausgleichsgewichte und drücken die Grundbacken aufgrund ihrer eigenen, radial nach aussen gerichteten Bewegung nach innen.It is known that the transition to higher speeds in lathes made it necessary to compensate for centrifugal force in order to prevent the clamping jaws from moving radially outward and thus preventing a workpiece from being released. For this purpose, as described in DE-GM 76 13 635.1, releasably attachable chucks are known on the flange of the rotating spindle of a lathe, which have radial grooves in their base, in which sliders are slidably mounted. These act on the base jaws of the clamping jaws as centrifugal force balancing weights via deflection levers and press the base jaws inwards due to their own, radially outward movement.
Bei Drehmaschinen besteht das grundsätzliche Problem des Überhanges des Spannfutters in bezug auf hinter dem Spindelflansch befindlichen Lager. Je grösser der Überhang ist, desto mehr wird das Rattern der Spindel begünstigt und die Bearbeitungsgenauigkeit verringert. Da die zuvor erwähnten Aufspannfutter mit Fliehkraftausgleich wegen der Gleitstücke und der Umlenkhebel eine relativ grosse axiale Länge haben, ergeben sich ungünstige Bedingungen hinsichtlich des Überhanges des Aufspannfutters.With lathes there is the fundamental problem of the overhang of the chuck in relation to the bearings located behind the spindle flange. The larger the overhang, the more the chattering of the spindle is promoted and the machining accuracy is reduced. Since the aforementioned chucks with centrifugal force compensation have a relatively large axial length because of the sliding pieces and the deflection levers, unfavorable conditions arise with regard to the overhang of the chuck.
Der Erfindung liegt die Aufgabe zugrunde, die Drehmaschinenspindel der eingangs genannten Art so auszubilden, dass der Überhang des Aufspannfutters möglichst gering ist.The invention has for its object to design the lathe spindle of the type mentioned in such a way that the overhang of the chuck is as small as possible.
Gelöst wird diese Aufgabe gemäss der Erfindung durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale.This object is achieved according to the invention by the features specified in the characterizing part of claim 1.
Zweckmässige Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Useful embodiments of the invention result from the subclaims.
Durch die einstückige Ausbildung des Spindelflansches und des Futterbodens wird das Aufspannfutter bzw. zumindestein Teil des Aufspannfutters in die Drehspindel integriert, so dass der Überhang des Aufspannfutters um die axiale Länge des Futterbodens verringert werden kann.Due to the integral design of the spindle flange and the chuck base, the chuck or at least part of the chuck is integrated into the lathe spindle, so that the overhang of the chuck can be reduced by the axial length of the chuck base.
Dadurch, dass der Futterkörper durch Verbindungselemente wie Bolzen an dem am Spindelflansch integrierten Futterboden befestigbar ist, wird eine kompakte Einheit gebildet, so dass keine Trennfuge zwischen Spindelflansch und Futterboden entsteht und sich in diesem Bereich eine hohe Steifigkeit ergibt.The fact that the chuck body can be fastened to the chuck base integrated into the spindle flange by connecting elements such as bolts, forms a compact unit so that there is no joint between the spindle flange and the chuck base and there is high rigidity in this area.
Ein weiterer Vorteil der geringeren Länge liegt darin, dass es nun möglich ist, die Fuge zwischen Spindelflansch und Futterkörper einschliesslich der radialen Nuten für die Fliehkraftgewichte komplett mittels eines Ringes, der am Maschinengehäuse befestigt ist, abzudecken und damit gegen Kühlmittel und Späne zu schützen. Da die Aussendurchmesser von Drehmaschinenfuttern genormt sind, genügt ein einziger, universeller Abdeckring, der aufgrund der einfach zu handhabenden O-Ring-Dichtung zum Futterkörper auch beim Futterwechsel nicht entfernt werden muss.Another advantage of the shorter length is that it is now possible to completely cover the joint between the spindle flange and the chuck body, including the radial grooves for the centrifugal weights, by means of a ring that is attached to the machine housing and thus protect it against coolants and chips. Since the outside diameters of lathe chucks are standardized, a single, universal cover ring is sufficient, which does not have to be removed when changing the chuck due to the easy-to-use O-ring seal to the chuck body.
Eine solche Abdeckung war beim Stand der Technik aus zwei Gründen nicht möglich: Erstens wären aufgrund der grösseren axialen Länge der Einheit und damit des Abdeckringes die Fliehkräfte am freien Ende des Abdeckringes zu gross geworden, um ein Aufplatzen des Ringes und damit eine Gefährdung der Bedienungsperson auszuschliessen und zweitens waren wegen des zusätzlichen Futterbodens die Umlenkhebel entsprechend länger als beim Erfindungsgegenstand, was zwangsweise zu grösserem Verschieben wegen der Fliehkraftgewichte führte und damit eine Abdeckung unmittelbar ausserhalb des Futterkörpers unmöglich machte.Such a cover was not possible in the prior art for two reasons: First, due to the greater axial length of the unit and thus the cover ring, the centrifugal forces at the free end of the cover ring would have become too great to prevent the ring from bursting and thus endangering the operator and secondly, because of the additional forage base, the bellcranks were correspondingly longer than in the subject matter of the invention, which inevitably led to greater displacement due to the centrifugal force weights and thus made it impossible to cover directly outside the forage body.
Die Erfindung wird nachstehend anhand der Fig. 1 und 2 beispielsweise erläutert. Es zeigt:
- Fig. 1 einen Axialschnitt der Drehmaschinenspindel im Spindelflanschbereich und
- Fig. 2 eine Aufsicht auf den Spindelflansch.
- Fig. 1 shows an axial section of the lathe spindle in the spindle flange area and
- Fig. 2 is a plan view of the spindle flange.
Die Drehspindel 11 einer nicht näher gezeigten Drehmaschine ist durch Lager 12 im Maschinengehäuse 20 gelagert und weist einen Flansch 13 zur lösbaren Befestigung eines Aufspannfutters mit Fliehkraftausgleich auf. Der Boden des Futters ist zusammen mit dem Spindelflansch 13 einstükkig ausgebildet. In diesem Spindelflansch 13 sind auf der dem Futterkörper 15 zugewandten Seite radiale Nuten 14 (Fig. 2) ausgebildet, in denen die Gleitstücke 22 verschiebbar geführt sind, die über nicht gezeigte Umlenkhebel und Grundbacken im Futterkörper 15 auf die Aufspannbacken 16 wirken.The rotating
Zwischen dem dem Spindelflansch 13 nächstgelegenen Lager 12 und dem Flansch 13 befindet sich eine Labyrinth-Dichtung 18, 19, die am Maschinengehäuse 20 befestigt ist.Between the bearing 12 closest to the
Ebenfalls im Zwischenraum zwischen dem Gehäuse 20 und dem Flansch 13 ist ein Ring 17 befestigt, der über den Flansch 13 bis zum Futterkörper 15 reicht, an dessen Umfang der Ring 17 mittels eines O-Dichtringes anliegt.Also in the space between the
In dem Futterkörper 15 befinden sich diejenigen Teile, die zur Verstellung der Spannbacken 16 mittels eines in die Spindelbohrung eingesetzten Zugrohres erforderlich sind.In the
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3233914A DE3233914C2 (en) | 1982-09-13 | 1982-09-13 | Lathe spindle with centrifugal force compensating chuck |
DE3233914 | 1982-09-13 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0103262A2 EP0103262A2 (en) | 1984-03-21 |
EP0103262A3 EP0103262A3 (en) | 1985-09-25 |
EP0103262B1 true EP0103262B1 (en) | 1988-01-07 |
Family
ID=6173085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83108787A Expired EP0103262B1 (en) | 1982-09-13 | 1983-09-06 | Lathe spindle with a chuck compensated for centrifugal forces |
Country Status (4)
Country | Link |
---|---|
US (1) | US4696209A (en) |
EP (1) | EP0103262B1 (en) |
JP (1) | JPS5964209A (en) |
DE (3) | DE3233914C2 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3822506C1 (en) * | 1988-07-04 | 1989-07-27 | Paul Forkardt Gmbh & Co Kg, 4000 Duesseldorf, De | |
JPH0448201U (en) * | 1990-08-27 | 1992-04-23 | ||
US5927169A (en) * | 1996-10-09 | 1999-07-27 | Hinson; Ronald L. | Lathe draw tube adaptor |
US5947989A (en) * | 1996-12-12 | 1999-09-07 | United States Surgical Corporation | Method and apparatus for transmyocardial revascularization |
US6723167B2 (en) * | 2000-12-21 | 2004-04-20 | Intel Corporation | Spindle sleeve for coater/developer |
DE602005019387D1 (en) * | 2004-03-31 | 2010-04-01 | Eastland Medical Systems Ltd | DRIVE |
CN101733417B (en) * | 2010-02-10 | 2011-05-11 | 辽宁西格马数控机床有限公司 | Numerical control vertical lathe spindle assembly |
CN102962785A (en) * | 2011-08-30 | 2013-03-13 | 浙江瑞远机床有限公司 | Numerical-control lathe main spindle box assembling clamp and assembling method |
DE102014006151B4 (en) | 2014-04-25 | 2021-08-05 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for measuring the concentricity of a machine tool and machine tool designed to carry out the method |
US10245648B2 (en) * | 2016-04-30 | 2019-04-02 | Citic Dicastal Co., Ltd | Aluminum alloy hub lathe fixture |
CN110799396B (en) | 2017-06-28 | 2021-12-03 | 弗克斯特有限公司 | Method and device for determining a position deviation of a rotating body |
CN110480041B (en) * | 2018-05-15 | 2024-06-14 | 西安西玛电机有限公司 | One-knife turning device for motor flange end cover |
CN112170878B (en) * | 2020-09-21 | 2021-08-27 | 浙江京速机床附件有限公司 | Compensation type finger-pressing chuck |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2698185A (en) * | 1954-12-28 | Combinationhwolkp | ||
US377779A (en) * | 1888-02-14 | Lathe | ||
US1250556A (en) * | 1916-03-25 | 1917-12-18 | Bullard Machine Tool Company | Work-spindle adjustment. |
DE388960C (en) * | 1923-03-22 | 1924-01-29 | Wesselmann Bohrer Co Werkzeug | Chucks, in particular lathe chucks |
DE724892C (en) * | 1937-09-11 | 1942-09-09 | Deutschland G M B H Maschf | Spindle flange connection on machine tools |
US2493574A (en) * | 1946-06-13 | 1950-01-03 | Niles Bement Pond Co | Lathe work driver |
US2697610A (en) * | 1948-10-04 | 1954-12-21 | Stanford Roberts Mfg Company | Radially reciprocating jaw chuck with fluid pressure actuator |
US3108412A (en) * | 1960-10-13 | 1963-10-29 | Erickson Tool Co | Chuck for gears and the like |
DE1988850U (en) * | 1968-04-26 | 1968-07-04 | Wohlenberg Kommanditgesellscha | INTERCHANGEABLE DISC FOR LATHE. |
FR2248901A1 (en) * | 1973-10-24 | 1975-05-23 | Precision Industrielle | Lathe chuck with counterbalanced pivoting jaws - uses net moment of centrifugal force on each arm to keep chuck tight |
DE2832297C2 (en) * | 1978-07-22 | 1986-09-25 | Günter Horst 7927 Sontheim Röhm | Chuck |
US4437675A (en) * | 1982-07-12 | 1984-03-20 | The Warner & Swasey Company | Chuck with centrifugal force compensation |
-
1982
- 1982-09-13 DE DE3233914A patent/DE3233914C2/en not_active Expired
- 1982-09-13 DE DE8225755U patent/DE8225755U1/en not_active Expired
-
1983
- 1983-09-06 EP EP83108787A patent/EP0103262B1/en not_active Expired
- 1983-09-06 DE DE8383108787T patent/DE3375089D1/en not_active Expired
- 1983-09-08 JP JP58164246A patent/JPS5964209A/en active Granted
-
1985
- 1985-03-15 US US06/712,356 patent/US4696209A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0103262A2 (en) | 1984-03-21 |
JPS5964209A (en) | 1984-04-12 |
JPS6111726B2 (en) | 1986-04-04 |
DE3375089D1 (en) | 1988-02-11 |
US4696209A (en) | 1987-09-29 |
DE8225755U1 (en) | 1985-08-08 |
EP0103262A3 (en) | 1985-09-25 |
DE3233914A1 (en) | 1984-03-15 |
DE3233914C2 (en) | 1986-02-13 |
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